A post shared by Jenson Button (@jensonbutton_22) on May 7, 2019 at 1:23pm PDT

Mercedes' immaculate start to the new season with four successive one-twos means there is again particular scrutiny on Ferrari heading into this weekend's event. The Scuderia have responded to their rivals' form by introducing an engine upgrade two races earlier than planned, in addition to further car tweaks to build on their new package used in Baku.

"The results seem to paint a relatively clear picture, but the truth is that they're too flattering. The performance has fluctuated in the first four races," insisted Mercedes boss Toto Wolff this week.

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Simon Lazenby and Martin Brundle look ahead to the Spanish GP from Barcelona.

Simon Lazenby and Martin Brundle look ahead to the Spanish GP from Barcelona.

"We had the fastest car in Australia and China, but we won in Bahrain thanks to our reliability when we were on the back foot in terms of speed. And while our race pace looked good in Azerbaijan, we were never able to build a truly comfortable gap to our rivals."

Sunday's race begins at 2.10pm with build-up from 12.30pm, while Saturday's qualifying coverage is at 1pm for a 2pm start.

A post shared by SkySportsF1 (@skysportsf1) on May 9, 2019 at 12:13am PDT

How to watch F1 2019 with Sky Sports F1Sky Sports F1 is the home of live and exclusive F1, and you can add the channel to your Sky package here. Sky F1's best-ever offer has returned, with new and existing customers in the UK able to add the channel for an extra £10 per month.